Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b313da8cdeff87…

MALICIOUS

PDF

96.9 KB Created: 2021-03-16 19:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b6247951de9e75c96b33fdca753157bf SHA-1: 0792092d8d49ce98cf4650347b3c497095ebe3c9 SHA-256: 06b313da8cdeff8759479f0228ef041ccdb6c2a3869952102520732667b9e049
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/wix?keyword=affidavit+for+name+change+after+marriage+for+bank PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477156/normal_5fed94b368fef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_6041c1df38f89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393626/normal_6002e92c54bc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_602012e994e76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_600f112f2951f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444623/normal_5fe544b4ac542.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/9giaEZP/38781589279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_6048950830acc.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/feridojubosalejezotiza.pdfIn PDF document text
    • https://cdn.sqhk.co/jopogoxom/gkVWohe/begrijpend_lezen_groep_4_werkbladen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475565/normal_60493b69b8df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528959/normal_604188d60522e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5febcd4d7f8ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/59309612088.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_1eae43e4eed840e2ba1e01f017fd9063.pdf?index=trueIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_cd1a554311f04be5bc4d814605068a45.pdf?index=trueIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_ce214cc54c5548ee9397be6b82b43e0c.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_0fab22c871384fcf8e19252d1ca5f87e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/gidir.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/dokumen_amdal_pertambangan.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/lenovo_g50-80_i3_memory_upgrade.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EF 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off00013de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE9 5476 bytes
SHA-256: fa10e1b2a7dd7a771ee85e94c0ee273ef21de5d85fe655647651a383ecd55ede
font_02_sfnt_off00015076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15076 11032 bytes
SHA-256: 8cf614aefde01a1b829c7744bec9ea02e1be3304cdb7cbcd4d37ff5a9db315f8